No. A decade is 10 years.
"twice per decade" = 2 / 10 years = 1nce per five years
A decade is ten years. Half a decade is five years.Therefore. four decades are forty years, plus the five years, totalling forty-five years (45 years).
Half a Decade
A synonym for every five years is quinquennial: as an adjective describes something that happens every five years or that lasts for five years; the noun means the fifth anniversary or a period of five years.
One decade is ten years. Thus, five decades would be 50 years.
Fifty years is equivalent to five decades, as a decade consists of ten years. To find this, you can simply divide 50 by 10, which results in 5. Therefore, 50 years encompasses five complete decades.
It's just five years, but you could say "Half a decade" if you want to be fancy.
It's just five years, but you could say "Half a decade" if you want to be fancy.
lustrum, pl = lustra http://www.thefreedictionary.com/lustrum
3 scores, one decade, five years seven decades five years 7.5 decades .75 centuries a senior
In 1 decade there are 10 years, so in 5 decades there are 50 years.
10 years is called a decade hence it is only a decade not decade of years